KR20120007319A

KR20120007319A - Apparatus for controlling cord length of a roll blind

Info

Publication number: KR20120007319A
Application number: KR1020100068027A
Authority: KR
Inventors: 김정민
Original assignee: 김정민
Priority date: 2010-07-14
Filing date: 2010-07-14
Publication date: 2012-01-20

Abstract

The present invention relates to a roll length adjusting device for roll blinds placed in a high position out of reach of young children by keeping the length of the string short by winding the lower end of the pulling string for elevating the blind fabric.
The present invention comprises a pull string for rotating or winding the winding rod through the driving pulley by winding or unwinding on the driving pulley connected to one side of the winding rod; Brake means mounted to the exit frame of the drive pulley and having a wedge member for fixing a pull strap; A length adjusting means including a plurality of tubes fitted to the pull string, and controlling the exposure length of the pull string by adjusting the number of tubes; And a spool wound around the end of the pull strap, having a coil spring for imparting elastic restoring force to the spool, and having a plurality of opposing stoppers for fixing the pull strap so that the pull strap is not released from the spool. It provides a roll length adjustment device for a roll blind comprising a; string storage means for winding the pulling string to the spool and stored therein.
According to the present invention, it is possible to completely prevent safety accidents such as neck wraps of young children due to the pulling string, and the beneficial effect that can be conveniently used is obtained by easily adjusting the length of the pulling string.

Description

Strap length adjusting device for roll blinds {APPARATUS FOR CONTROLLING CORD LENGTH OF A ROLL BLIND}

The present invention relates to a roll blind device that can block the inflow of sunlight through the window, and prevent the exposure of indoor privacy, and more specifically, the length of the cord by winding the bottom of the pull string for elevating the blind fabric inside By keeping it short and placing it in a high position out of reach of young children, it is possible to completely prevent safety accidents such as neck wraps of young children due to the pulling string, and easily adjust the height of the pulling string to a height that is convenient for the user. The present invention relates to a string length adjusting device for roll blinds, which improves convenience in use.

In general, roll blinds are installed in windows of various buildings, and are used as means for preventing light from outside, controlling lighting in a room, or invading privacy in a room.

Such roll blinds typically have one or a plurality of blind fabrics installed in the horizontal direction, which are rolled up on the upper winding rods and stored or rolled up from the winding rods to prevent windows.

An example of such a conventional roll blind 1 is shown in FIG. 1.

The conventional roll blind 1 is provided with a driving bracket 12 and a driven bracket 14 on both sides of the frame 10 fixed to a wall or the like, and between the brackets 12 and 14 in the form of pipes. Winding rod 20 is rotatably mounted, the blind fabric 30 is wound around the winding rod 20, the weight 40 is fixed to the lower end of the winding rod 20 by the weight of the weight 40 The blind fabric 30 is unloaded downward from the bottom.

In addition, the driving bracket 12 is provided with a driving pulley 50 which is integrally connected to the winding rod 20 and rotates, and the pulling pull 60 is wound around the driving pulley 50 such as this pulling. Pulling one side of the string 60, the winding rod 20 is rotated through the drive pulley 50, the blind fabric 30 is wound around the winding rod 20 is raised.

In addition, when the other side of the pull string 60 is pulled, the driving pulley 50 rotates in the opposite direction while rotating the winding rod 20 in the opposite direction, so that the blind fabric 30 is unwinded from the winding rod 20 and lowered. do.

Meanwhile, the pull string 60 used to operate the user to roll up or down the blind fabric 30 is wound around the driving pulley 50 in an endless track shape, the lower end of which is illustrated in FIG. 1. As it has been, it hangs down long. Therefore, such pull string 60 can cause a very dangerous situation.

For example, young children often hide behind the blind fabric 30 that hangs down while playing hide-and-seek in their homes. This cold often causes safety accidents.

The neck wrap safety accident of such a pull string 60 is very fatal, and when children play while the pull string 60 is caught in the neck, it is known to easily choke.

In addition, the pull string 60 of the conventional roll blind (1) device stretched in the endless track type is a trackless rope that is easily hung down below by a child who is often running indoors, or the weak and weak elderly Safety accidents that are seriously injured by falling and falling often occur.

In order to fundamentally prevent such a problem, the conventional pulling strings 60 stretched in an endless track type are not connected to each other, and the pulling strings 60 are placed high so that they cannot be reached by young children. It is desirable to keep young children or the elderly from getting caught in the strings.

However, the conventional roll blinds 1 keep the length short by separating the lower end of the pulling string 60 in this way, and when the high position is placed out of reach of children, the blind fabric 30 is appropriate There is a serious demand in the industry for the development of new technologies that cannot be lifted to a height, which can solve the problem of safety accidents.

An object of the present invention is to solve the conventional problems as described above, by pulling the lower end of the pulling string lifting the blind fabric inside to keep the length of the string short and pull by placing in a high position out of reach of young children It is to provide a string length adjusting device for roll blinds that can be completely prevented in advance, such as the safety of children's neck wound by the string.

Another object of the present invention is to adjust the length of the pull string by using a tube that is fitted to the pull string to adjust the position of the pull string according to the user's convenient height, thereby improving the ease of use roll It is to provide a strap length adjusting device for a blind.

In order to achieve the above object, the present invention, in the roll blind device that the blind fabric is wound around the winding rod or used to unwind from the winding rod, the winding pulley on the driving pulley connected to one side of the winding rod, or driven pulley A pulling string for rotating the winding rod through and elevating the blind fabric wound on the winding rod; Brake means mounted to the exit frame of the drive pulley and having a wedge member for fixing a pull strap; And a spool wound around the end of the pull string, and having an elastic restoring member for imparting elastic restoring force to the spool, and a plurality of opposite stoppers for fixing the pull string so that the pull string is not released from the spool. And a strap storage means for winding the pull strap on the spool and storing it inside. The short length of the pull strap is adjusted to be positioned at a high position out of reach of young children, and the pull strap is pulled out of the blind fabric. Provided is a string length adjusting device for roll blinds configured to adjust the height, fix the position of the pulling string in the pulled state, and then elastically wrap and store the string in the storage means.

In order to achieve the above object, the present invention, in the roll blind device that the blind fabric is wound around the winding rod or used to unwind from the winding rod, the winding pulley on the driving pulley connected to one side of the winding rod, or driven pulley A pulling string for rotating the winding rod through and elevating the blind fabric wound on the winding rod; Brake means mounted to the exit frame of the drive pulley and having a wedge member for fixing a pull strap; And a spool wound around the end of the pull string, and having an elastic restoring member that provides elastic restoring force to the spool by using connection gears, and a stopper for fixing the pull string so that the pull string is not released from the spool. It includes a strap storage means for winding the pull strap on the spool and stored therein; including a short adjustment of the length of the pull strap to be placed in a high position out of reach of children, blind fabric by pulling the pull strap It provides a strap length adjusting device for roll blinds configured to adjust the height of the, to fix the position of the pull string in the pulled state, and then to elastically wound and store in the string storage means.

In addition, the present invention preferably the brake means has a casing which is fixed to the outer frame integrally to the exit frame of the drive pulley, the casing is a built-in wedge member of a circular gear shape therein, the casing is the upper edge A first opening having a diameter equal to the diameter of the wedge member is formed in the lower opening, and a second opening opening through which the pulling string is made is formed at a lower edge thereof, and the diameter of the wedge member and the pulling string are formed at one side of the casing. The wedge member receiving space having a width corresponding to the diameter is formed, while the wedge member receiving space has a structure in which the inclined surface is formed on one side from the first opening to close the pulling string toward the wedge member receiving space to move the pulling string upward. The wedge member then moves along the slope to the first opening side and pulls the string between the first openings. Rolls configured to secure the pulling string together, and pull the pulling string against the opposite side of the wedge member receiving space so that the wedge member falls from the first opening side to the wedge member receiving space to release the pulling string. Provides a strap length adjuster for blinds.

The present invention preferably consists of a plurality of cylindrical tubes fitted between the brake means and the string storage means, and the length of the pull string between the string storage means from the frame by adjusting the number of mounting of such tubes. Provided is a string length adjusting device for a roll blind configured to further comprise a length adjusting means for adjusting.

In addition, the present invention preferably the string storage means is provided with a hollow housing, the upper edge of the housing is formed with a string opening, the inside of the housing is provided with a spool wound around the end of the pull string, The center of the spool is equipped with an elastic restoring member for imparting elastic restoring force, the upper side of the spool is provided with a plurality of opposing stoppers for fixing the pull string so that the pull string is not released from the spool at both corners of the housing, The stoppers respectively form a gripping surface that constricts and secures the pulling string on both sides of the pulling string, and a pressing surface that presses the gripping surface toward the pulling string side to the outside of the housing so that the user presses the pressing surface of the stopper. Pressing the gripping surface presses the pulling string to secure the pulling string, the gripping surface is pulled Releasing the crimping of the strap provides a roll length adjustment device for roll blinds configured to wind the pull strap onto the spool and store therein as the elastic restoring force of the elastic restoring member.

And the present invention preferably the string storage means is provided with a hollow housing, the upper edge of the housing is formed with a string inlet, the inside of the housing so that the spool winding the end of the pull string inside the rotatable And a resilient restoring member configured to impart an elastic restoring force to a lower side of the spool, wherein a first connecting gear is mounted on a central axis of the spool, and the first connecting gear rotates by an elastic restoring member. The coupling gear is geared and the elastic restoring force of the elastic restoring member is transmitted to the spool, and the upper side of the spool has a stopper hinged to one corner of the housing, and the stopper clamps the pull strap to the inner support surface of the housing. A holding surface for fixing is formed inside the housing, and a pressing surface for pressing the holding surface to the pull string side is formed outside the housing. When the user presses the pressing surface of the stopper so that the gripping surface compresses the pulling string around the hinge, the pulling string is fixed, and when the gripping surface releases the pressing state of the pulling string, the elastic restoring force of the elastic restoring member is obtained. Provided is a string length adjuster for roll blinds configured to wind the pull string around the spool and store therein.

According to the present invention, the pulling string for elevating the blind fabric is made as a single line rather than an endless track unlike the prior art, and the lower end thereof is connected to the spool of the string storage means and is wound around the spool as an elastic restoring force of the coil spring. The length of the string of the pulling string hanging down from the frame can be kept short.

In addition, by placing the short-held pull string at a high position out of reach of young children, it is possible to completely prevent safety accidents such as neck wrap of the young children due to the pull string.

In addition, according to the present invention by using a tube that is fitted to the pull string can be adjusted by the length of the pull string can be adjusted to the height and position of the pull strap at any time to a convenient height for the user, accordingly can be used conveniently A beneficial effect is obtained.

1 is a perspective view showing a roll blind according to the prior art.
Figure 2 is an enlarged cross-sectional view of the roll blind string adjusting device according to a first embodiment of the present invention.
3A is a side cross-sectional view of the first embodiment of the present invention.
Figure 3b shows the operating state of the string storage means in the first embodiment of the present invention, the left side is a state in which the pull string is released, the right side is a state in which the pull string is fixed.
4A is a side sectional view and a plan sectional view of a brake means provided in the first and second embodiments of the present invention.
4B is an explanatory view of the operation of the brake means shown in FIG. 4A.
Figure 5a is an enlarged cross-sectional view of the roll blind string adjusting device according to a second embodiment of the present invention.
5B is an enlarged side cross-sectional view of a second embodiment of the present invention.
FIG. 6A is an explanatory view showing a home position in which a blind fabric is unshielded from a winding rod and shielded in a roll length adjusting device for roll blinds according to first and second embodiments of the present invention.
Figure 6b is an explanatory view showing a state in which the blind fabric is raised from the winding rod to the intermediate position by the downward pull of the pull string in the present invention.
Figure 6c is an explanatory view showing a state in which the length of the pull string is kept short because the pull string is wound on the inner spool by the operation of the strap storage means in the present invention.
Figure 7a is an explanatory view showing a state in which the blind fabric is raised to the raised position of the open state by repeating the increase of the blind fabric, the length adjustment operation of the pull string by the additional downward pull of the pull string in the present invention.
7B is an explanatory view showing a state in which the blind fabric is lowered from the open state to the light-shielded state by the lowering of the blind fabric by the pull string release operation of the brake means in the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Roll strap length adjustment device 100 according to the present invention, as shown in Figure 2, to keep the blind fabric 110 wound around the winding rod 120, or to use it to unwind from the winding rod 120 In the roll blind device to adjust the length of the pull string 130 is to be placed in a high position out of reach of young children.

Roll blind string adjusting device 100 according to the present invention is provided with a pull string 130 to elevate the blind fabric 110 wound on the winding rod 120, this pull string 130 is a winding rod ( It is wound on the driving pulley 132 connected to one side of 120, and is made of a single string form instead of the conventional trackless structure.

In addition, the pull string 130 is wound on the outer surface of the drive pulley 132 for rotating the winding rod 120, as a result of pulling the pull string 130 wound on the drive pulley 132 to drive the pulley 132 When rotated, the winding rod 120 rotates to wind the blind fabric 110 around it, as shown in FIG. 2, to raise the blind fabric 110.

The strap blind length adjusting device 100 according to the present invention is mounted on the exit frame 134 of the drive pulley 132, the brake means having a wedge member 144 for fixing the pull string 130 140.

The brake means 140 is such that the user operates it to fix the pull string 130 in place. As shown in FIG. 4A, the brake unit 140 integrally faces the exit frame 134 of the driving pulley 132. The casing 142 is fixed.

The casing 142 has a wedge member 144 having a circular gear shape therein, and the casing 142 has a first opening 146a having an inner diameter equal to the diameter of the wedge member 144 at an upper edge thereof. ) Is formed so that the wedge member 144 is inserted therein through the first opening 146a.

In addition, a second opening 146b is formed at the lower edge of the casing 142 to allow the pulling string 130 to enter and exit, and the second opening 146b may not pass through the wedge member 144. The wedge member 144 formed in a small size and inserted into the casing 142 is maintained in the casing 142.

In addition, one side of the casing 142 is formed with a wedge member receiving space 148 of a width corresponding to the diameter of the wedge member 144 and the diameter of the pull string 130, such a wedge member receiving space 148 From to the first opening 146a has a structure in which an inclined surface 148a is formed on one side.

Therefore, the brake means 140 has the first opening 146a and the second opening (after the wedge member 144 is inserted therein through the upper first opening 146a of the casing 142). When the pull string 130 is inserted to pass through the 146b, the diameter of the first opening 146a is reduced, so that the wedge member 144 does not come out toward the first opening 146a, so that the inside of the casing 142 is closed. Is kept on.

As shown in FIG. 4B, when the brake means 140 is intended to fix the pull string 130, the brake means 140 comes into close contact with the lower side of the pull string 130 toward the wedge member 144 on the right side. 144 is in close contact with the inclined surface 148a in the wedge member receiving space 148 by the pull string 130.

When the pull string 130 is released in this state, the pull string 130 is pulled to the upper side while the blind fabric 110 is lowered by the weight 112 of the blind fabric 110. In addition, the wedge member 144 is pushed up along the inclined surface 148a toward the first opening 146a.

Therefore, the wedge member 144 tries to escape through the first opening 146a, but since the diameter of the first opening 146a is reduced by the pulling string 130, the first opening 146a is intact. ) Can not be squeezed out, it is fixed to the pull string 130 inside the first opening (146a).

In this way, the pull string 130 is fixed by the wedge member 144 at the position, the blind fabric 110 stops the falling state, and stops at that position.

On the other hand, if you want to release the fixing state of the pull string 130 in this state, pull the pull string 130 to the lower side, and stir to the opposite side of the wedge member 144, pull string 130 Along with the wedge member 144 is lowered from the first opening 146a, to release the fixing state of the pull string 130, the wedge member 130 is located in the interior of the wedge member receiving space 148 The first opening 146a and the second opening 146b can freely move up and down. As a result, in this state, the blind fabric 110 can be freely moved down by the weight of the weight 112.

In this way, the user can freely fix the pulling string 130 or release the fixed state of the pulling string 130 through the brake means 140.

And the roll blind string adjusting device 100 according to the present invention includes a length adjusting means 160 for adjusting the exposure length of the pull string 130.

Such length adjusting means 160 includes a plurality of cylindrical tubes 162 that are fitted to the pull string 130 between the brake means 140 and the string storage means 170 described later, By adjusting the number of mounting of the same tube 162 to adjust the length of the pull string 130 from the frame 134 to the string storage means 170.

That is, the length adjusting means 160 is to insert a plurality of tubes 162 having a length of about 5cm to about 15cm in each of the pull string 130, by adjusting the number of such tubes 162 pull string 130 The length exposed to the lower side of the roll blind frame 134 is adjusted.

These tubes 162 are larger in diameter than the second opening 146b of the brake means 140 and are disposed outside the casing 142 of the brake means 140, as described later. Of course, the larger diameter than the string inlet 178 of the storage means 170 is located on the outside thereof.

In addition, the string length adjustment device 100 for a roll blind in accordance with the present invention includes a string storage means 170 for winding the pulling string 130 in the spool 174 and stored therein.

Such string storage means 170 is provided with a hollow housing 172, as shown in Figures 2 and 3, the spool 174 is located inside the housing 172 therein A circular spool space 174a and a stopper space 176a on which the stoppers 176 are disposed.

In addition, a string inlet 178 is formed at the upper edge of the housing 172. Such a string inlet 178 is slightly larger than the diameter of the pull string 130 to allow only free entry and exit of the pull string 130. .

In addition, the housing 172 is provided with a spool 174 that winds the end of the pull string 130 therein, such a spool 174 is located in a circular spool space 174a, the spool ( Pull string 130 is wound around 174 to adjust its length.

Such a spool 174 is equipped with an elastic restoring member such as a coil spring 180 to impart an elastic restoring force to the center thereof, such a coil spring 180 has its center 182 fixed to the housing 172. The outer end 184 is fixed to the inner circumferential surface of the spool 174 to be connected to the spool 174, and the coil spring 180 is connected to the spool 174 in a state where the elastic restoring force is given in advance. The spool 174 is rotated to impart rotational force to wind the pull string 130 around it.

Therefore, unless a separate external force is applied to the pull string 130, the spool 174 is rotated by the coil spring 180 to wind the pull string 130 around the storage.

The stopper 176 is positioned at the upper side of the spool 174, and the stopper 176 is formed to face each other, and the pull string 130 is formed at both edges of the housing 172 from the spool 174. The pull string 130 is fixed so as not to loosen.

That is, the plurality of opposing stoppers 176 are formed in the form of a block which is movable in the width direction on both sides of the housing 172, respectively, a wave for narrowly fixing the pull string 130 on both sides of the pull string 130. The ground 190 is formed to face the inside of the housing 172.

In addition, a pressing surface 192 for pressing the holding surface 190 toward the pulling string 130 is formed to face the outer side of the housing 172 so that the user presses the pressing surface 192 of the stopper 176 to hold the pressing surface 192. 190 is configured to be fixed to the pulling string 130 when the pressing string 130 is pressed.

The plurality of stoppers 176 as described above form a stepped portion 194 having an enlarged diameter in the middle portion thereof so as not to fall out from the inside of the housing 172, and the gripping surface 190 forms an uneven surface on the surface thereof and pulls the string When it comes in close contact with the 130 is configured to exert a more firm grip.

Therefore, when the user presses the stopper 176 to fix the pull string 130 between the gripping surfaces 190, the user may maintain the same state as the user holds the pull string 130 through the stopper 176. When the gripping surfaces 190 release the pressing state of the pulling string 130, the pulling string 130 is wound around the spool 174 as an elastic restoring force of the coil spring 180 to be stored therein.

Roll blind length adjustment device 100 according to the present invention configured as described above, as shown in Figure 6a, the blind fabric 110 is in a lowered state, that is, the blind fabric 110 as in the lowered position (P1) By the weight of the weight 112 attached to the bottom of the window can be opened by lifting the blind fabric 110 to the desired position from the state of the shading of the window.

As the blind fabric 110 is lowered as described above, the pulling string 130 is wound around the driving pulley 132 by the lowered length of the blind fabric 110, and in this state, the user holds the string storage means 170. By pulling the pull string 130, the blind fabric 110 is raised to a certain height.

At this time, when the user presses the plurality of stoppers 176 of the string storage means 170, the gripping surface 190 compresses and fixes the pulling string 130, and when the string storage means 170 is pulled in such a state. The pull string 130 is easily pulled because it is fixed by the stopper 176, and rotates the driving pulley 132 to move the blind fabric 110 to a middle position P2 of a predetermined height as shown in FIG. 6B. Raise to.

And when the user stirs the pull string 130 to the right in this state, the pull string 130 is in close contact with the wedge member 144 of the brake means 140 toward the inclined surface (148a), in this state pull string ( When the pulling force 130 is released, the pull string 130 is pulled to lower the weight 112 of the blind fabric 110, but the pull string 130 is applied to the wedge member 144 of the brake means 140. It is caught by the blind fabric 110 is fixed in place.

When the pull string 130 is fixed as described above, the user releases the pressing state of the stopper 176 of the string storage means 170, so that the string storage means 170 is spool 174 by the elastic restoring force of the coil spring 180. Rotate the winding around the pull string 130, and as shown in Figure 6c, while pulling up the pull string 130 inside the string storage means 170 as it is raised to expose the pull string 130 The length will be adjusted.

In such a state, the user presses the stopper 176 of the string storage means 170 again to fix the pull string 130 between the gripping surfaces 190, and when the string storage means 170 is pulled again, the brake means. The pull string 130 is pulled down while the latching state of the 140 is released, and the blind fabric 110 is further wound on the winding rod 120 by rotating the driving pulley 132.

This state is shown in Figure 7a, by pressing the stopper 176 of the string storage means 170 as described above pulling the pull string 130, using the brake means 140 to secure the pull string 130 , And wound around the spool 174 of the string storage means 170, the brake means 140 is released again to pull the pull string 130, and the operation of winding up the blind fabric 110 in a repeated light-shielding state From the blind fabric 110 to raise the blind fabric 110 in the open state of the raised position (P3) is completely raised to the upper side, it is possible to fix the pull string 130 in a locked state using the brake means (140). .

Meanwhile, the blind fabric 110 may be raised in this manner, and then the blind fabric 110 may be lowered in the light-shielding state to the lowered position P1. In this case, as illustrated in FIG. 7B, the brake means 140 may be lowered. By releasing the locking state of the pulling string so that the pulling string 130 can pass through, the blind fabric 110 is lowered, and when the stopper 176 of the string storage means 170 is released, the spool 174 Since the pull string 130 is unwinded and wound on the driving pulley 132, the blind fabric 110 is completely lowered to maintain the light shielding state.

Second Embodiment

Hereinafter, the cord blind length adjusting device 200 according to the second embodiment of the present invention will be described in more detail with reference to FIGS. 5A and 5B.

The roll blind strap adjusting device 200 according to the second embodiment of the present invention is essentially the same as the first embodiment and many components, and the same reference numerals are assigned to the same components as shown in the drawings. In the following description, redundant descriptions will be omitted for the sake of simplicity.

Roll strap length adjustment device 200 according to the second embodiment of the present invention includes a string storage means 170 for winding the pull string 130 to the spool 174 and stored therein, such a string The storage means 170 has a hollow housing 172, a circular spool space 174a in which the spool 174 is located, and a stopper 176 at an upper side thereof. ) Forms a stopper space 176a where the coils are disposed and a spring space 180a on which the coil spring 180 is disposed.

And a string entrance 178 is formed at the upper edge of the housing 172, such a string entrance 178 is slightly larger than the diameter of the pull string 130 to allow only the free entry of the pull string 130.

In addition, the spool 174 located in the spool space 174a is wound around the pull string 130 to adjust its length, and is mounted in a rotatable state inside the spool space 174a.

Such a spool 174 is mounted to the first coupling gear 202 on one side thereof to be coupled to the second coupling gear 204 of the coil spring 180, such coil spring 180 is the spring space ( The inner end of the spring space 180a is integrally fixed to one housing 172 of the spring space 180a, and the other end thereof is coupled to the inside of the second connecting gear 204.

The coil spring 180 is a state in which the elastic restoring force is accumulated in advance, and is coupled to the spool 174 to transmit power through the first and second connection gears 202 and 204, so that a separate Unless an external force is applied to the pulling string 130, the spool 174 is rotated by the elastic restoring force of the coil spring 180 to wind and store the pulling string 130 around it.

In addition, the upper side of the spool 174 includes a stopper 176 coupled to a hinge 177 at one edge of the housing 172, and the stopper 176 is hinged at the upper end in the stopper space 176a. (177) is connected to be rotatable.

As shown in FIG. 5B, the stopper 176 forms a gripping surface 190 inside the housing 172 to narrowly fix the pulling string 130 to the inner support surface of the housing 172. A pressing surface 192 is formed outside the housing 172 to press the ground 190 toward the pulling string 130, so that a user presses the pressing surface 192 of the stopper 176 to wave the hinge 177. The ground 190 is designed to compress the pull string 130.

Therefore, when the gripping surface 190 compresses the pulling string 130, the pulling string 130 is fixed, and when the gripping surface 190 releases the pressing state of the pulling string 130, the coil spring 180 is closed. As the elastic restoring force, the pull string 130 is configured to be wound around the spool 174 and stored therein.

Like the first embodiment, the gripping surface 190 of the stopper 176 is formed with an uneven surface to be configured to exert a more firm gripping force when in close contact with the pulling string 130.

Therefore, when the user presses the stopper 176 to fix the pull string 130, the user may maintain the same state as the user grasps the pull string 130 through the stopper 176, and the gripping surface 190 is pulled. When the string 130 is released, the pull string 130 is wound around the spool 174 and stored therein as the elastic restoring force of the coil spring 180 through the first and second connection gears 202 and 204. Done.

The structure of the second embodiment according to the present invention configured as described above can form a slim structure of the string storage means 17 compared to the structure of the first embodiment so that the user can easily hold it.

Roll blind strap length adjusting device 200 according to a second embodiment of the present invention configured as described above, as shown in Figure 6a to 7a, the blind fabric 110 is lowered, that is, the blind fabric 110 By the weight of the weight 112 attached to the bottom of the window can be opened by lifting the blind fabric 110 to the desired position from the state of the lowered position (P1) that the light shielding is made.

As described above, in the light-shielding state where the blind fabric 110 is lowered, the user grabs the string storage means 170 and pulls the pull string 130 to raise the blind fabric 110 to a predetermined height.

In this case, the user presses the stopper 176 of the string storage means 170 to fix the pulling surface 190 by pressing the pull string 130, and when pulling the string storage means 170 in this state, the pull string ( 130 is easily pulled out, and as shown in FIG. 6B, the drive pulley 132 is rotated to raise the blind fabric 110 to a predetermined height intermediate position P2.

In this state, the user stirs the pull string 130 to the right to fix the pull string 130 as the brake means 140, and releases the pressing state of the stopper 176 of the string storage means 170. The elastic restoring force of 180 rotates the spool 174 through the first and second connecting gears 202 and 204 to wind the pull string 130 around it and ascend, as shown in FIG. 6C, The pull string 130 is wound around and stored inside the string storage means 170.

This state is shown in Figure 7a, by pressing the stopper 176 of the string storage means 170 as described above pulling the pull string 130, using the brake means 140 to secure the pull string 130 , Winding and storing the pull string 130 in the spool 174 of the string storage means 170, and again to release the brake means 140 to pull the pull string 130 and repeat the operation to wind up the blind fabric (110) The blind fabric 110 is raised from the light shielding state to the open state where the blind fabric 110 is completely raised to the upper side, that is, the raised fabric P110 is raised, and the pull string 130 is locked by the brake means 140. Can be fixed.

Meanwhile, the blind fabric 110 may be raised in this manner, and then the blind fabric 110 may be lowered again in a light shielding state. In this case, as shown in FIG. 7B, the locking strap 130 of the brake unit 140 may be locked. By releasing the state to allow the pull string 130 to pass through, the blind fabric 110 is lowered, the pull string 130 is released and wound on the drive pulley 132, so the blind fabric 110 is raised position ( P3) is completely lowered to the lowered position P1 to maintain the light shielding state.

As described above, according to the present invention, the pulling string 130 for elevating the blind fabric 110 is made as a single line rather than an endless track unlike the prior art, and a lower end thereof is inside the spool 174 of the string storage means 170. By being connected to the coil spring 180 can be stored in the spool 174 as a resilient restoring force, it is possible to keep the length of the string of the pull string 130 stretched downward from the frame 134.

In addition, by placing the short pull string 130 in a high position out of reach of young children, it is possible to completely prevent safety accidents such as neck wrap of the young children by the pull string 130 in advance.

And the present invention can adjust the sagging length of the pulling string 130 by adjusting the mounting number of the tube 162 of the length adjusting means 160 to be fitted to the pulling string 130, pulled at any time to a height that is convenient for the user The position and length of the string 130 can be adjusted, and thus can be conveniently used.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications are within the scope of the present invention as long as they are obvious to those skilled in the art.

1 ...... Conventional Roll Blinds 10 ....... Frame
12 ...... driven bracket 14 ...... driven bracket
20 ...... Winding Rod 30 ...... Blind Fabric
40 ...... weight 50 ....... drive pulley
60 ...... Pull string 100,200 ... Length adjustment device for roll blinds
110 ...... blind fabric 112 ...... weight
120 ......
132 ...... drive pulley 140 ....... brake means
142 ...... Casing 144 ...... Wedge Section
146a ..... 1st opening 146b ...... 2nd opening
148 ...... Wedge member receiving space 148a ...... Slope
160 ...... Length adjusting means 162 ...... Tube
170 ....... String storage means 172 ...... Housing
174 ...... spool 174a ...... spool space
176 ...... stopper 176a ...... stopper space
177 ...... Hinge 178 ...... String Doorway
180 ...... coil spring 180a ..... spring space
182 ...... Center 184 ...... Outer End
190 ...... Pushed surface 192 ...... Push face
194 ...... Step 202 ...... 1st Connection Gear
204 ...... Secondary connection gear P1 ....... Down position
P2 ...... Mid Position P3 ....... Rising Position

Claims

In the roll blind apparatus, the blind fabric is wound around the winding rod or used to unwind from the winding rod,
A pulling string for winding or unwinding on the driving pulley connected to one side of the winding rod to rotate the winding rod through the driving pulley, and elevating the blind fabric wound on the winding rod;
Brake means mounted to the exit frame of the drive pulley and having a wedge member for fixing a pull strap; And
A spool wound around the end of the pull strap, and having an elastic restoring member for imparting elastic restoring force to the spool, and having a plurality of opposing stoppers for fixing the pull strap so that the pull strap is not released from the spool. And a strap storage means for winding the pull strap on the spool and storing it inside. The short length of the pull strap is adjusted to be positioned at a high position out of reach of young children, and the height of the blind fabric is pulled by pulling the pull strap. Adjusting, fixing the position of the pull string in the pulled state, and then adjusting the length of the roll blind straps characterized in that it is configured to be elastically wound in the strap storage means.

In the roll blind apparatus, the blind fabric is wound around the winding rod or used to unwind from the winding rod,
A pulling string for winding or unwinding on the driving pulley connected to one side of the winding rod to rotate the winding rod through the driving pulley, and elevating the blind fabric wound on the winding rod;
Brake means mounted to the exit frame of the drive pulley and having a wedge member for fixing a pull strap; And
A spool having a spool wound around the end of the pulling string, and having an elastic restoring member for providing elastic restoring force to the spool using connecting gears, and a stopper for fixing the pulling string so that the pulling string is not released from the spool. And a strap storage means for winding the pull strap on the spool and storing it inside. The short length of the pull strap is adjusted to be placed at a high position out of reach of young children. Adjusting the height, fixing the position of the pull string in the pulled state, and then the length adjustment device for roll blinds, characterized in that configured to be elastically wound in the storage means.

The casing according to claim 1 or 2, wherein the brake means includes a casing having an outer surface integrally fixed to an exit frame of the driving pulley, wherein the casing has a wedge member having a circular gear shape therein, and the casing includes: A first opening having a diameter equal to the diameter of the wedge member is formed at an upper corner thereof, and a second opening opening for entering and exiting a pulling string is formed at the lower corner thereof, and one side of the casing has a diameter of the wedge member. A wedge member accommodating space having a width corresponding to the diameter of the pulling string is formed, while the wedge member accommodating space has a structure in which an inclined surface is formed on one side from the wedge member accommodating space to close the pulling string toward the wedge member accommodating space side. Move the wedge member along the inclined surface toward the first opening side and pull the string between the first openings. When the pull string is fixed together and the pull string is pulled to the opposite side of the wedge member receiving space, the wedge member is configured to drop from the first opening side to the wedge member receiving space to release the pull string. Length adjusting device for roll blinds.

3. The pulley according to claim 1 or 2, comprising a plurality of cylindrical tubes fitted between the brake means and the string storage means, and which are fitted in the pull string, by adjusting the number of mounting of such tubes. Length adjusting device for roll blinds, characterized in that it further comprises a length adjusting means for adjusting the length of the string.

The method of claim 1, wherein the strap storage means has a hollow housing, the upper edge of the housing is formed with a string opening, the inside of the housing has a spool to wrap the end of the pull string therein, An elastic restoring member is provided at the center of the spool, and an elastic restoring member for imparting elastic restoring force is provided, and on the upper side of the spool, a plurality of opposing stoppers are provided at both corners of the housing to fix the pulling string so that the pulling string is not released from the spool. They each form a gripping surface opposite the inner side of the housing on the both sides of the pull strap and the pressing surface for pressing the gripping surface toward the outside of the housing so that the user pushes the pressing surface of the stopper When the grippers press the pull string, the pull strap is fixed, and the grippers press the pull string. When off, the state roll blind strap length adjustment device according to claim that is configured to pull the strap by winding the spool as the elastic restoring force of the resilient restoring member stored therein.

According to claim 2, wherein the strap storage means has a hollow housing, the upper edge of the housing is formed with a string opening, the inside of the housing is mounted so as to rotate the spool winding the end of the pull string inside And a resilient restoring member for providing an elastic restoring force to a lower side of the spool, and a first connecting gear mounted to a central axis of the spool, wherein the first connecting gear rotates by a resilient restoring member. Gears are geared and the elastic restoring force of the elastic restoring member is transmitted to the spool. The upper side of the spool has a stopper hinged to one corner of the housing, and the stopper is fixed to the inner support surface of the housing. A holding surface to be formed inside the housing, and a pressing surface for pressing the holding surface to the pull string side to the outside of the housing When the pressing surface of the stopper is pressed against the hinge so that the gripping surface compresses the pulling string, the pulling string is fixed. When the gripping surface releases the pressing state of the pulling string, the pulling string is used as the elastic restoring force of the elastic restoring member. Length adjusting device for roll blinds, characterized in that configured to be wound around the spool and stored inside.